MIL ON - DTC P1457 Set

01-011

March 6, 2001

Applies To:
1998-99 Accord - See VEHICLES AFFECTED

MIL Comes On With DTC P1457
(Supersedes 01-011, dated January 23, 2001)

SYMPTOM

The MIL is on, and DTC P1457 [leak detected in EVAP control system (EVAP control canister system)] is set.

PROBABLE CAUSES

The symptom could be the result of any of these causes:

^ An EVAP system component fails.

^ The PCM does a diagnostic test on the EVAP system before the primary heated oxygen sensor (H025) is active. If this happens on two consecutive driving cycles, the MIL comes on and DTC P1457 falsely sets.

*^ The EVAP system depends on operation of the EVAP control canister vent shut valve for the diagnostic self-test. If the valve does not function properly, the MIL comes on and DTC P1457 sets. This condition can occur with vehicles normally driven in any of the states listed below Failure of this component does not affect the performance of the EVAP system.*

VEHICLES AFFECTED

PCM Failure:
1998-99 Accord - L4 models with A/T

EVAP Control Canister Vent Shut Valve Failure:
1998-99 Accord - All models normally driven in any of these states:

Illinois New Hampshire

Indiana New York

Iowa North Dakota

Maine Ohio

Massachusetts Pennsylvania

Michigan Vermont

Minnesota Wisconsin

CORRECTIVE ACTION

Retrieve the DTC with the PGM Tester, and review the Freeze Data. Depending on whether the feedback condition of the primary H025 reads "open" or "closed," take the appropriate action described in DIAGNOSIS.





PARTS INFORMATION

WARRANTY CLAIM INFORMATION





In warranty:
The normal warranty applies.

Out of warranty:
Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Service Manager or your Zone Office. You must request consideration, and get a decision, before starting work.

DIAGNOSIS

*Use the PGM Tester, with SN122P or later software, to retrieve the DTC.
Check the primary HO2S feedback condition. Data will be displayed as "open" or "closed."*

^ If the primary HO2S feedback condition reads "closed," refer to S/B 99-074, Diagnosing DTC P1456 and DTC P1457, and if appropriate, to S/B 99-075, Troubleshooting DTC P1456 and P1457, both filed under Fuel and Emissions. Make any needed repairs. If the vehicle is normally driven in any of the states listed, also go to REPAIR PROCEDURE B, and replace the EVAP control canister vent shut valve.

*^ If the primary HO2S feedback condition reads go to REPAIR PROCEDURE A, and replace the PCM. If the vehicle is normally driven in any of the states listed, also go to REPAIR PROCEDURE B, and replace the EVAP control canister vent shut valve.*

REPAIR PROCEDURE A (1998-99 Accord L4 models with A/T)

1. EX models only: Make sure you have the anti-theft code for the radio.

2. Write down your customer's radio station presets.

3. Disconnect the negative cable from the battery.





4. Remove and discard the PCM.

5. Install the appropriate new PCM.

6. Reconnect the negative battery cable.

7. EX models only: Enter the anti-theft code for the radio.

8 Enter your customer's radio station presets. Reset the clock.

*9. Store the immobilizer system key codes in the PCM with the PGM Tester; see Service Bulletin 00-049, Immobilizer System (Type 2), filed under Body Electrical.*

REPAIR PROCEDURE B (1998-99 Accord models normally driven in the any of the states listed.





1. Raise the vehicle on a lift.

2. Remove and discard the EVAP control canister vent shut valve and 0-ring.

3. Install the new vent shut valve and 0-ring.

4. Lower the vehicle.





Disclaimer